# DeepSeek V4.1 Flash vs GPT-5.6 Luna

As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in 6 of 8 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).

DeepSeek V4.1 Flash: $0.23463 per 1M blended tokens.

GPT-5.6 Luna: $0.44999999999999996 per 1M blended tokens.

DeepSeek V4.1 Flash: open weights.

GPT-5.6 Luna: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in General LLM at #29 against #53.
- Which to pick, Reasoning: As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in Reasoning at #27 against #55.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.6 Luna leads DeepSeek V4.1 Flash in Science at #25 against #36.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in Coding › Web dev at #19 against #43.
- Which to pick, Long context: As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in Long context at #32 against #65.
- Which to pick, Vision: As of Oct 15, 2026, GPT-5.6 Luna leads DeepSeek V4.1 Flash in Vision at #19 against #21.
- Which to pick, Factuality: As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in Factuality at #22 against #35.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.6 Luna in Abstraction (ARC) at #8 against #19.

As of Oct 15, 2026, DeepSeek V4.1 Flash is state of the art on best per dollar in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, GPT-5.6 Luna is ranked #16 in Coding (since Oct 15, 2026; sources Terminal-Bench 4.0; methodology v1.0).